1287064 has 8 divisors (see below), whose sum is σ = 2413260. Its totient is φ = 643528.

The previous prime is 1287061. The next prime is 1287067. The reversal of 1287064 is 4607821.

It is an interprime number because it is at equal distance from previous prime (1287061) and next prime (1287067).

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80434 + ... + 80449.

2^1287064 is an apocalyptic number.

It is an amenable number.

1287064 is a deficient number, since it is larger than the sum of its proper divisors (1126196).

1287064 is a wasteful number, since it uses less digits than its factorization.

1287064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160889 (or 160885 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1287064 is about 1134.4884309679. The cubic root of 1287064 is about 108.7760742517.

The spelling of 1287064 in words is "one million, two hundred eighty-seven thousand, sixty-four".